M. R. Hoeferkamp
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View article: Response of AC-coupled Low Gain Avalanche Detectors to Ionizing and Non-ionizing Radiation Damage
Response of AC-coupled Low Gain Avalanche Detectors to Ionizing and Non-ionizing Radiation Damage Open
Low gain avalanche diodes with DC- and AC-coupled readout were exposed to ionizing and non-ionizing radiation at levels relevant to future experiments in particle, nuclear, and medical physics and to astrophysics. Damage-related change in …
View article: Evidence of Charge Multiplication in Thin $25 \mathrm{μm} \times 25 \mathrm{μm}$ Pitch 3D Silicon Sensors
Evidence of Charge Multiplication in Thin $25 \mathrm{μm} \times 25 \mathrm{μm}$ Pitch 3D Silicon Sensors Open
Characterization measurements of $25~\mathrm{μm} \times 25~\mathrm{μm}$ pitch 3D silicon sensors are performed, for devices with active thickness of $150~μ$m. Evidence of charge multiplication caused by impact ionization below the breakdow…
View article: Investigation of low gain avalanche detectors exposed to proton fluences beyond 10<sup>15</sup> n <sub>eq</sub> cm<sup>-2</sup>
Investigation of low gain avalanche detectors exposed to proton fluences beyond 10<sup>15</sup> n <sub>eq</sub> cm<sup>-2</sup> Open
Low gain avalanche detectors (LGADs) deliver excellent timing resolution, which can mitigate mis-assignment of vertices associated with pileup at the High Luminosity LHC and other future hadron colliders. The most highly irradiated LGADs w…
View article: Curing early breakdown in silicon strip sensors with radiation
Curing early breakdown in silicon strip sensors with radiation Open
View article: Investigation of low gain avalanche detectors exposed to proton fluences beyond $10^{15}$ $n_{eq} cm^{-2}$
Investigation of low gain avalanche detectors exposed to proton fluences beyond $10^{15}$ $n_{eq} cm^{-2}$ Open
Low gain avalanche detectors (LGADs) deliver excellent timing resolution, which can mitigate mis-assignment of vertices associated with pileup at the High Luminosity LHC and other future hadron colliders. The most highly irradiated LGADs w…
View article: Latest results from the RD42 collaboration on the radiation tolerance of polycrystalline diamond detectors
Latest results from the RD42 collaboration on the radiation tolerance of polycrystalline diamond detectors Open
As nuclear and particle physics facilities move to higher intensities, the detectors used there must be more radiation tolerant. Diamond is in use at many facilities due to its inherent radiation tolerance and ease of use. In this article …
View article: Investigation of low gain avalanche detectors exposed to proton fluences beyond 10$^{15}$ n$_\mathrm{eq}$cm$^{-2}$
Investigation of low gain avalanche detectors exposed to proton fluences beyond 10$^{15}$ n$_\mathrm{eq}$cm$^{-2}$ Open
Low gain avalanche detectors (LGADs) deliver excellent timing resolution, which can mitigate mis-assignment of vertices associated with pileup at the High Luminosity LHC and other future hadron colliders. The most highly irradiated LGADs w…
View article: Modeling of Surface Damage at the Si/SiO$_2$-interface of Irradiated MOS-capacitors
Modeling of Surface Damage at the Si/SiO$_2$-interface of Irradiated MOS-capacitors Open
Surface damage caused by ionizing radiation in SiO$_2$ passivated silicon particle detectors consists mainly of the accumulation of a positively charged layer along with trapped-oxide-charge and interface traps inside the oxide and close t…
View article: Hadron damage investigation of low gain avalanche detectors
Hadron damage investigation of low gain avalanche detectors Open
The High Luminosity Large Hadron Collider upgrade will increase the luminosity of the LHC by a factor of 10. Low gain avalanche detectors (LGADs) promise excellent timing resolution, which can mitigate the pileup associated with high lumin…
View article: Progress in Diamond Detectors
Progress in Diamond Detectors Open
Detectors based on Chemical Vapor Deposition (CVD) diamond have been used successfully in Luminosity and Beam Condition Monitors (BCM) in the highest radiation areas of the LHC. Future experiments at CERN will accumulate an order of magnit…
View article: Radiation tolerance of diamond detectors
Radiation tolerance of diamond detectors Open
Diamond is used as detector material in high energy physics experiments due to its inherent radiation tolerance. The RD42 collaboration has measured the radiation tolerance of chemical vapour deposition (CVD) diamond against proton, pion, …
View article: Characterization of Low Gain Avalanche Detector Prototypes’ Response to Gamma Radiation
Characterization of Low Gain Avalanche Detector Prototypes’ Response to Gamma Radiation Open
Motivated by the need for fast timing detectors to withstand up to 2 MGy of ionizing dose at the High Luminosity Large Hadron Collider, prototype low gain avalanche detectors (LGADs) have been fabricated in a single pad configuration, 2 × …
View article: Novel Sensors for Particle Tracking: a Contribution to the Snowmass Community Planning Exercise of 2021
Novel Sensors for Particle Tracking: a Contribution to the Snowmass Community Planning Exercise of 2021 Open
Five contemporary technologies are discussed in the context of their potential roles in particle tracking for future high energy physics applications. These include sensors of the 3D configuration, in both diamond and silicon, submicron-di…
View article: Proposed Triple-Wall, Voltage-Isolating Electrodes for Multiple-Bias-Voltage 3D Sensors
Proposed Triple-Wall, Voltage-Isolating Electrodes for Multiple-Bias-Voltage 3D Sensors Open
Dividing 3D active-edge silicon sensors into separate sections with a triple-wall sandwich of two trench electrodes separated by an insulating layer, will allow two or more bias voltages to be used simultaneously. Such sensors could be fab…
View article: Response of Low Gain Avalanche Detector Prototypes to Gamma Radiation
Response of Low Gain Avalanche Detector Prototypes to Gamma Radiation Open
Motivated by the need for fast timing detectors to withstand up to 2 MGy of ionizing dose at the High Luminosity Large Hadron Collider, prototype low gain avalanche detectors (LGADs) have been fabricated in single pad configuration, 2x2 ar…
View article: Prediction of Leakage Current and Depletion Voltage in Silicon Detectors Under Extraterrestrial Radiation Conditions
Prediction of Leakage Current and Depletion Voltage in Silicon Detectors Under Extraterrestrial Radiation Conditions Open
Silicon detection is a mature technology for registering the passage of charged particles. At the same time it continues to evolve toward increasing radiation tolerance as well as precision and adaptability. For these reasons it is likely …
View article: A Study of the Radiation Tolerance of CVD Diamond to 70 MeV Protons, Fast Neutrons and 200 MeV Pions
A Study of the Radiation Tolerance of CVD Diamond to 70 MeV Protons, Fast Neutrons and 200 MeV Pions Open
We measured the radiation tolerance of commercially available diamonds grown by the Chemical Vapor Deposition process by measuring the charge created by a 120 GeV hadron beam in a 50 μm pitch strip detector fabricated on each diamond sampl…
View article: Collider Physics (Final Technical Report)
Collider Physics (Final Technical Report) Open
The UNM members of the ATLAS Collaboration published a comprehensive study of ATLAS Pixel leakage current recorded from the beginning of Run 1 through the end of Run 2. This study depended upon a hardware system that was designed and built…
View article: Study of CMOS strip sensor for future silicon tracker
Study of CMOS strip sensor for future silicon tracker Open
View article: Recent progress in CVD diamond detector R&D
Recent progress in CVD diamond detector R&D Open
We present an overview of the latest developments from RD42 in diamond detector R&D.; They include the radiation hardness coefficients for 800MeV and 24 GeV protons, the hit detectionefficiency for two 3D detector prototypes with two diffe…
View article: Beam test results of 3D pixel detectors constructed with poly-crystalline CVD diamond
Beam test results of 3D pixel detectors constructed with poly-crystalline CVD diamond Open
As a possible candidate for extremely radiation tolerant tracking devices we present a novel detector design - namely 3D detectors - based on poly-crystalline CVD diamond sensors with a pixel readout. The fabrication of recent 3D detectors…
View article: Latest Results on the Radiation Tolerance of Diamond Detectors
Latest Results on the Radiation Tolerance of Diamond Detectors Open
We have measured the radiation tolerance of chemical vapor deposition (CVD) diamond against protons and neutrons. The relative radiation damage constant of 24 GeV protons, 800 MeV protons, 70 MeV protons, and fast reactor neutrons is prese…
View article: Recent Results from Polycrystalline CVD Diamond Detectors
Recent Results from Polycrystalline CVD Diamond Detectors Open
Diamond is a material in use at many nuclear and high energy facilities due to its inherent radiation tolerance and ease of use. We have characterized detectors based on chemical vapor deposition (CVD) diamond before and after proton irrad…
View article: New test beam results of 3D and pad detectors constructed with poly-crystalline CVD diamond
New test beam results of 3D and pad detectors constructed with poly-crystalline CVD diamond Open
View article: Latest Results on Radiation Tolerance of Diamond Detectors
Latest Results on Radiation Tolerance of Diamond Detectors Open
At present most experiments at the CERN Large Hadron Collider (LHC) are planning upgrades in the next 5-10 years for their innermost tracking layers as well as luminosity monitors to be able to take data as the luminosity increases and CER…
View article: A study of the radiation tolerance of poly-crystalline and single-crystalline CVD diamond to 800 MeV and 24 GeV protons
A study of the radiation tolerance of poly-crystalline and single-crystalline CVD diamond to 800 MeV and 24 GeV protons Open
We have measured the radiation tolerance of poly-crystalline and single-crystalline diamonds grown by the chemical vapor deposition (CVD) process by measuring the charge collected before and after irradiation in a 50 m pitch strip detector…
View article: Results on radiation tolerance of diamond detectors
Results on radiation tolerance of diamond detectors Open
View article: Charge collection in irradiated HV-CMOS detectors
Charge collection in irradiated HV-CMOS detectors Open
View article: Diamond detector technology, status and perspectives
Diamond detector technology, status and perspectives Open
View article: Application of p–i–n photodiodes to charged particle fluence measurements beyond <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="mml10" display="inline" overflow="scroll" altimg="si10.gif"><mml:mn>1</mml:mn><mml:msup><mml:mrow><mml:mn>0</mml:mn></mml:mrow><mml:mrow><mml:mn>15</mml:mn></mml:mrow></mml:msup></mml:math> 1-MeV-neutron-equivalent/cm<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="mml11" display="inline" overflow="scroll" altimg="si11.gif"><mml:msup><mml:mrow/><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:math>
Application of p–i–n photodiodes to charged particle fluence measurements beyond 1-MeV-neutron-equivalent/cm Open